Its more network related. with being unable to predict what nework routes will get more traffic then others. its impossible to launch a game in america without experiencing issues. we pioneered the nationwide network infrastructure. but its old and poorly designed so there is no good way to predict where traffic is going to come from in high quantities. but once you know its not hard to fix. that's what every MMO has had issues with. adding more servers wont stop your network route thats not configured or setup to handle the traffic its piping communicate to the servers